Internal-combustion engine.



T. W. FOTHERGILL.

INTERNAL COMBUSHON ENGINE.

APPLICATION FILED APR.11. 1914.

I'zlfentvd Jnfw 27, 1916.

4 SHEETSWSHEET 2.

T. W. FOTHERGlLL.

(MERNAL comusTmN ENGaNE,

APPi HLAHON HLED AP ll.. 1914.

. 88,435., *zmfnted June 27, 1916.

T. W. FOTHERGILL.

INTERNAL COMBUSUON ENGINE.

APPLICATION HLD APR. H. {934.

Patentvd ;Inne 27, 1916.

Tim/872202 sists in keeping them clean and preventing the accuuiulation of carbon on the spark points. i

lt will be noted that the packings of the piston valves are at opposite sides of the intake ports 18 or 19 at the time the explosion takes place, and therefore, the impact of the explosion on the valve is balanced, and at the same time communication is cut oii' to the carbureter, so that danger of back-firing is avoided.

'l`h` projcctions -l, 44" act to till the chambers 42, 42' within the valves 32, 32' and the spacce iu the euds of the lvalve chambers 34, 34', when -the valves' `are withdrawn tln'a'el'rom. makingr pract'ibal the employnient of the balam'ing pistons and the supply passages through the body of the valves.

The inclined faces of the projections act as.

deflectors to direct the charge compressed gis'ihrowth the inlet ports. i

1. An interi'iiil.'combustion engine comprisinar a working cylinder, a valve chamher having supply a'm'ldischarge ports at different lougitUdinal,points, said discharge' port opening: to said eyliinler, a valve body in Said ('hambei; havingr a pair of balanced pistons thereon-aiul a lqnzitudinal passage thcrein opening to Said Chamber at the opposite sides of said pistons,`anl means to niove said body between positions to open the ends of said passage tol said port's and to hold said pistons at opposite sides of Said discharge port. i

2. An internal combustion en ine com- I n'ising a working cylinder, a va ve chamher closed at one end and having an inlet port and a lateral discharge port opening into said cylinder, a piston valve havi g a longitudinal bore in the body thereof enin; r at its inner end to the closed end of said chamber and at its outer end tofsaid inlet port in certain positions thereof, and a projection mounted at the closed end of said chamber and arranged to" enter saidl bore in the inner position of said valve. i

3'. An internal combustion engine comprising a working cylinder, a valve Chamber closed at one end and having an inlet port and a lateral discharge port opening into said cylinder at one side, a piston valve having a longitudinal -bore in the body thereof opening at its inner end to the closed end of said ('-hamber and at its outer end to said Ainlet port in certain positions thereof.` and a projection mounted at'the closed end of'said f chaniber and arranged to enter said borein the inner position of said valve, said projcction havingr a deflecting face at its end for directing' the flow of gas through said dischargtport. w

In testiinony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

THEROX V. FOTHERGILL.

Witiiesses: w

i J. VV. COOPER,

JAM`ns B. PALMER. 

